Produced by Juliet Sutherland, Jon Niehof and the Online Distributed Proofreading Team at www.pgdp.net [Illustration] SCIENTIFIC AMERICAN SUPPLEMENT NO. 421 NEW YORK, JANUARY 26, 1884 Scientific American Supplement. Vol. XVII., No. 421. Scientific American established 1845 Scientific American Supplement, $5 a year. Scientific American and Supplement, $7 a year. * * * * * TABLE OF CONTENTS I. ENGINEERING AND MECHANICS.--Furcot's Six Horse Power Steam Engine.--With several figures. 6714 Foot Lathes.--With engraving. 6715 Endless Trough Conveyer.--2 engravings. 6715 Railroad Grades of Trunk Lines. 6715 English Express Trains.--Average speed, long runs, etc. 6715 Apparatus for Separating Substances Contained in the Waste Waters of Paper Mills, etc.--2 figures. 6717 II. TECHNOLOGY.--An English Adaptation of the American Oil Mill.--Description of the apparatus, and of the old and new processes.--Several engravings. 6716 Large Blue Prints.--By W.B. Parsons, Jr. 6717 III. ELECTRICITY, ETC.--Electrical Apparatus for Measuring and for Demonstration at the Munich Exhibition.--With descriptions and numerous illustrations of the different machines. 6711 A New Oxide of Copper Battery.--By F. De Lalande and S. Chaperon.--With description and three illustrations. 6714 IV. MATHEMATICS, ETC.--To Find the Time of Twilight.--1 figure. 6720 A New Rule for Division in Arithmetic. 6725 Experiments in Binary Arithmetic. 6726 V. ARCHAEOLOGY.--Grecian Antiquities.--With engravings of the Monument of Philopappus.--Tomb from the Ceramicus.--Tower of the winds.--The Acropolis.--Old Corinth.--Temple of Jupiter.--The Parthenon.--Temple of Theseus, etc. 6721 VI. NATURAL HISTORY, ETHNOLOGY, ETC.--Poisonous Serpents and their Venom.--By Dr. Archie Stockwell.--A serpent's mouth, fangs, and poison gland.--Manner of attack.--Nature of the venom.--Action of venom.--Remedies. 6719 Ethnological Notes.--Papuans.--Negritos. 6720 VII. HORTICULTURE, BOTANY, ETC.--The Hornbeams.--Uses to which the tree is put.--Wood for manufactures.--For fuel.--Different varieties.--With engravings of the tree as a whole, and of its leaves, fruit, flowers, etc. 6724 Fruit of Camellia Japonica.--1 engraving. 6725